A high-durability gate valve made of ultra-high strength alloy material

Abstract

This invention relates to the field of valve technology and discloses a high-durability gate valve made of ultra-high strength alloy material, comprising a shell, a connecting ring fixedly connected to the outer wall of the shell, a motor fixedly connected to the outer wall of the shell, a push assembly fixedly connected to the inner wall of the shell, and a movable assembly fixedly connected to the inner wall of the shell. It also includes a valve body mechanism, comprising a connecting pipe, the outer wall of which is fixedly connected to the connecting ring, and a hollow column fixedly connected to the end of the connecting pipe away from the connecting ring. By setting the push assembly, when the equipment needs to be closed urgently, the movable assembly is pushed out from the front of the rotating assembly, and then the push rod is activated to drive the right-angle ring to close the partition. This process is faster than rotating the threaded column, avoiding subsequent equipment failure due to slow valve body closing speed.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a high-durability gate valve made of ultra-high strength alloy material. Background Technology

[0002] Gate valves are a common type of valve, primarily used to cut off or connect the medium in pipelines. The working principle of a gate valve is based on the lifting and lowering movement of a gate. The gate is typically a flat plate parallel to the direction of medium flow, and the up-and-down movement of the valve stem causes the gate to move up and down between the valve seat within the valve body. When the gate is fully raised, the medium in the pipeline can pass through unimpeded, and the valve is fully open; when the gate is lowered and comes into close contact with the valve seat, the flow of the medium is cut off, and the valve is closed.

[0003] Patent application CN202210299956.0 discloses a gate valve, relating to the field of valve technology, which solves the technical problem of leakage caused by severe wear on one side of the sealing surface due to fluid pressure difference on both sides of the gate. The gate valve includes a valve body, a valve stem, and a gate connected to one end of the valve stem for blocking or opening the fluid passage within the valve body. The valve stem passes sequentially through a bracket and a cylinder connected to the valve body. A switching element is connected to the valve stem, and a limiting part is provided within the bracket, forming a switching gap with the top of the bracket's inner cavity. When the gate valve is opened, the switching element can only move vertically along the limiting part to restrict the valve stem's vertical movement. When the gate rises into the cylinder and the switching element rises into the switching gap, the valve stem can rotate 180° under external force, thus achieving the switching of the inlet and outlet sealing surfaces when the gate descends to the position blocking the fluid passage. This prevents wear on only one side of the gate's sealing surface due to fluid pressure difference on both sides, preventing gate valve leakage.

[0004] When the above-mentioned equipment is in use, the valve body is controlled by rotating the threaded column. However, when the pipeline malfunctions or leaks, the valve body needs to be closed quickly. At this time, due to the threaded column, it is necessary to rotate it many times to close the valve body, which makes the emergency closure of the valve body not timely. Summary of the Invention

[0005] The purpose of this invention is to provide a high-durability gate valve made of ultra-high strength alloy material to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-durability gate valve using ultra-high strength alloy material, comprising a shell, a connecting ring fixedly connected to the outer wall of the shell, a motor fixedly connected to the outer wall of the shell, a pushing assembly fixedly connected to the inner wall of the shell, and a movable assembly fixedly connected to the inner wall of the shell, and further comprising:

[0007] The valve body mechanism includes a connecting pipe, the outer wall of which is fixedly connected to a connecting ring. A hollow column 1 is fixedly connected to the end of the connecting pipe away from the connecting ring. Hollow columns 2 are fixedly connected to both the upper and lower ends of the hollow column 1. A baffle 1 is movably connected to the inner wall of the hollow column 1. A slider 1 is fixedly connected to the end of the baffle 1 away from the hollow column 1. The outer wall of the slider 1 is movably connected to the hollow column 2. A connecting column 1 is fixedly connected to the end of the slider 1 away from the baffle 1. A connecting head is fixedly connected to the end of the connecting column 1 away from the slider 1. A right-angle plate is fixedly connected to the outer wall of the connecting head. A U-shaped plate 1 is fixedly connected to the outer wall of the right-angle plate. The U-shaped plate 1 is used to receive the external force brought by the right-angle ring. A slider 2 is fixedly connected to the end of the right-angle plate away from the connecting head. The slider 2 is used to receive the external force brought by the rotation of the threaded column. A rotating component is provided on the inner wall of the slider 2. A pressing plate is fixedly connected to the outer wall of the hollow column 2.

[0008] According to the above technical solution, the pushing component includes a sliding column, the inner wall of the outer shell is fixedly connected to the sliding column, the outer wall of the sliding column is movably connected to a right-angle ring, and the end of the right-angle ring away from the sliding column is fixedly connected to a push rod. The end of the push rod away from the right-angle plate is fixedly connected to the outer shell. The pushing component does not directly contact the connecting column, which ensures that the right-angle ring will not affect the operation of the equipment during normal operation.

[0009] According to the above technical solution, the rotating component includes a circular plate, the output end of the motor is fixedly connected to the circular plate, and a sliding column two is fixedly connected to the side of the circular plate away from the outer shell. The outer wall of the sliding column two has a protruding part, so the rotation of the sliding column two can drive the threaded column to rotate. An elastic component one is fixedly connected to the inner wall of the sliding column two, and a connecting column two is fixedly connected to the end of the elastic component one away from the sliding column two.

[0010] According to the above technical solution, a baffle two is fixedly connected to the outer wall of the connecting column two, and a threaded column is fixedly connected to the side of the baffle two away from the connecting column two. The inner wall of the threaded column is movably connected to the sliding column two, and a baffle three is fixedly connected to the end of the threaded column away from the baffle two. The inner wall of the baffle three is movably connected to the sliding column two. When the equipment is in an emergency shutdown state, the threaded column will move inward under the pull of the slider two, and the movable connection between the sliding column two and the threaded column provides space for the movement of the threaded column.

[0011] According to the above technical solution, the movable component includes a push rod two, the inner wall of the outer shell is fixedly connected to the push rod two, the end of the push rod two away from the outer shell is fixedly connected to a connecting plate one, and the outer wall of the connecting plate one is fixedly connected to a U-shaped plate two.

[0012] According to the above technical solution, an elastic component two is fixedly connected to the inner wall of the outer shell, a connecting plate two is fixedly connected to the end of the elastic component two away from the outer shell, a sliding plate one is fixedly connected to the side of the connecting plate two away from the elastic component two, a connecting plate three is fixedly connected to the end of the sliding plate one away from the connecting plate two, and a sliding plate two is fixedly connected to the outer wall of the connecting plate three.

[0013] According to the above technical solution, the inner wall of the slide plate one is movably connected to the slider three, the end of the U-shaped plate two away from the connecting plate one is fixedly connected to the slider three, the inner wall of the slider three is rotatably connected to the connecting rod through the bearing, the end of the connecting rod away from the slider three is rotatably connected to the blocking plate through the bearing, the side of the connecting plate three away from the slide plate one is movably connected to the blocking plate, and the outer wall of the blocking plate is fixedly connected to the elastic component three, the end of the elastic component three away from the blocking plate is fixedly connected to the connecting plate three. When the movable component is pushed forward, the blocking plate will be moved away first, so that the rotating component will not block the movement of the movable component, and then the movable component will be driven to leave from the front end of the rotating component.

[0014] According to the above technical solution, an elastic component four is fixedly connected to the outer wall of the slide plate two. A U-shaped plate three is fixedly connected to the end of the elastic component four away from the slide plate two. A limiting post is fixedly connected to the end of the U-shaped plate three away from the elastic component four. The outer wall of the limiting post is movably connected to the slide plate one. Both ends of the U-shaped plate three are rotatably connected to a connecting plate four through bearings. A sliding post three is fixedly connected to the end of the connecting plate four away from the U-shaped plate three. The outer wall of the sliding post three is connected to the slide plate two. After the movable component is pushed out, the limiting post will be embedded in the slider three, preventing the slider three from moving. In this way, when the movable component is reset, the blocking plate will not prevent the rotating component from being embedded in the movable component.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0016] 1. This invention, by setting a push component, pushes the movable component out from the front of the rotating component when the equipment needs to be shut down urgently. Then, the push rod is activated to drive the right-angle ring to close the partition. This process is faster than that of rotating threaded column, avoiding subsequent equipment failures due to the valve body closing too slowly.

[0017] 2. By setting a rotating component, when the push component controls the device to close, the movement of the baffle one can drive the threaded column to move together. In this way, the threaded column will not affect the push component's emergency closing of the baffle one, ensuring the smooth emergency closing.

[0018] 3. By setting up an active component, the present invention pushes the active component forward when an emergency shutdown of the device is required, so that there are no other connected obstructions in front of the active component, thus ensuring the smooth implementation of the emergency shutdown.

[0019] 4. By setting up a movable component, after the device completes an emergency shutdown, it is necessary to return the device to its normal working state. At this time, the movable component will allow the rotating component to be embedded in the movable component, and then the movable component will be fixed. This can ensure the normal operation of the device reset. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the driving component of the present invention;

[0024] Figure 4 This is a schematic diagram of the valve body mechanism of the present invention;

[0025] Figure 5 This is a cross-sectional view of the valve body mechanism of the present invention;

[0026] Figure 6 This is a schematic diagram of the rotating component of the present invention;

[0027] Figure 7 This is a cross-sectional view of the rotating component of the present invention;

[0028] Figure 8 This is a schematic diagram of the active components of the present invention;

[0029] Figure 9 This is the present invention. Figure 8 Enlarged view of A in the middle;

[0030] Figure 10 This is a schematic diagram of the internal parts of the active component of the present invention;

[0031] In the diagram: 1. Outer shell; 101. Connecting ring; 102. Motor; 11. Push assembly; 111. Sliding column one; 112. Right-angle ring; 113. Push rod one; 2. Valve body mechanism; 201. Connecting pipe; 202. Hollow column one; 203. Hollow column two; 204. Baffle one; 205. Slider one; 206. Connecting column one; 207. Connector; 208. Extrusion plate; 209. Right-angle plate; 2010. U-shaped plate one; 2011. Slider two; 21. Rotating assembly; 211. Circular plate; 212. Sliding column two; 213. Elastic assembly one; 214. 215. Connecting post 2; 216. Baffle 2; 217. Threaded post; 22. Baffle 3; 22. Movable component; 221. Push rod 2; 222. Connecting plate 1; 223. U-shaped plate 2; 224. Elastic component 2; 225. Connecting plate 2; 226. Slide plate 1; 227. Connecting plate 3; 228. Slide plate 2; 229. Slider 3; 2210. Connecting rod; 2211. Elastic component 3; 2212. Blocking plate; 2213. Elastic component 4; 2214. U-shaped plate 3; 2215. Restricting post; 2216. Connecting plate 4; 2217. Sliding post 3. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Example 1: See Figures 1-5 The present invention provides a technical solution: a high-durability gate valve using ultra-high strength alloy material, comprising a shell 1, a connecting ring 101 fixedly connected to the outer wall of the shell 1, a motor 102 fixedly connected to the outer wall of the shell 1, a pushing assembly 11 fixedly connected to the inner wall of the shell 1, and a movable assembly 22 fixedly connected to the inner wall of the shell 1, and further comprising:

[0036] Valve body mechanism 2 includes a connecting pipe 201. The outer wall of the connecting pipe 201 is fixedly connected to a connecting ring 101. A hollow column 202 is fixedly connected to the end of the connecting pipe 201 away from the connecting ring 101. Hollow columns 203 are fixedly connected to both the upper and lower ends of the hollow column 202. A baffle 204 is movably connected to the inner wall of the hollow column 202. A slider 205 is fixedly connected to the end of the baffle 204 away from the hollow column 202. The outer wall of the slider 205 is movably connected to the hollow column 203. A connecting post 206 is fixedly connected to the end of the connecting post 205 away from the baffle 204. A connector 207 is fixedly connected to the end of the connecting post 206 away from the slider 205. A right-angle plate 209 is fixedly connected to the outer wall of the connector 207. A U-shaped plate 2010 is fixedly connected to the outer wall of the right-angle plate 209. A slider 2011 is fixedly connected to the end of the right-angle plate 209 away from the connector 207. A rotating component 21 is provided on the inner wall of the slider 2011. An extrusion plate 208 is fixedly connected to the outer wall of the hollow post 203.

[0037] The pushing component 11 includes a sliding column 111. The inner wall of the outer shell 1 is fixedly connected to the sliding column 111. A right-angle ring 112 is movably connected to the outer wall of the sliding column 111. A push rod 113 is fixedly connected to the end of the right-angle ring 112 away from the sliding column 111. The end of the push rod 113 away from the right-angle plate 209 is fixedly connected to the outer shell 1.

[0038] The working principle of this embodiment is as follows: When the equipment needs to be shut down urgently, the active component 22 is activated to contact the threaded post 216 to restrict the connecting post 206, and then the push rod 113 is activated to drive the right-angle ring 112 to move. The movement of the right-angle ring 112 will drive the connecting post 206 to move inward through the U-shaped plate and the connector 207. The movement of the connecting post 206 will drive the baffle 204 through the slider 205 to close the connecting pipe 201.

[0039] Example 2: Based on Example 1, please refer to... Figures 6-10The rotating assembly 21 includes a circular plate 211. The output end of the motor 102 is fixedly connected to the circular plate 211. A sliding post 212 is fixedly connected to the side of the circular plate 211 away from the outer casing 1. An elastic component 213 is fixedly connected to the inner wall of the sliding post 212. A connecting post 214 is fixedly connected to the end of the elastic component 213 away from the sliding post 212. A baffle 215 is fixedly connected to the outer wall of the connecting post 214. A threaded post 216 is fixedly connected, and the inner wall of the threaded post 216 is movably connected to the sliding post 212. A baffle 3 217 is fixedly connected to the end of the threaded post 216 away from the baffle 215. The inner wall of the baffle 3 217 is movably connected to the sliding post 212. After the movable component 22 moves away from the connecting post 214, the movement of the connecting post 1 206 will drive the threaded post to move together through the right angle plate 209 and the sliding block 2011. At this time, the sliding post 2 will be pulled out from the threaded post.

[0040] The movable component 22 includes a push rod 221. The inner wall of the outer shell 1 is fixedly connected to the push rod 221. A connecting plate 222 is fixedly connected to the end of the push rod 221 away from the outer shell 1. A U-shaped plate 223 is fixedly connected to the outer wall of the connecting plate 222. An elastic component 224 is fixedly connected to the inner wall of the outer shell 1. A connecting plate 225 is fixedly connected to the end of the elastic component 224 away from the outer shell 1. A [missing information - likely a component name] is fixedly connected to the side of the connecting plate 225 away from the elastic component 224. A sliding plate 226 is formed, with a connecting plate 227 fixedly connected to the end of the sliding plate 226 away from the connecting plate 225. A sliding plate 228 is fixedly connected to the outer wall of the connecting plate 227. A slider 229 is movably connected to the inner wall of the sliding plate 226. A U-shaped plate 223 is fixedly connected to the slider 229 at the end away from the connecting plate 222. A connecting rod 2210 is rotatably connected to the inner wall of the slider 229 via a bearing. The connecting rod 2210 is located away from the slider 229. One end of the slide plate 228 is rotatably connected to a baffle plate 2212 via a bearing. The side of the connecting plate 227 away from the slide plate 226 is movably connected to the baffle plate 2212. An elastic component 2211 is fixedly connected to the outer wall of the baffle plate 2212. The end of the elastic component 2211 away from the baffle plate 2212 is fixedly connected to the connecting plate 227. An elastic component 2213 is fixedly connected to the outer wall of the slide plate 228. The end of the elastic component 2213 away from the slide plate 228 is fixed. A U-shaped plate 2214 is connected. A limiting post 2215 is fixedly connected to one end of the U-shaped plate 2214 away from the elastic component 2213. The outer wall of the limiting post 2215 is movably connected to the sliding plate 226. Both ends of the U-shaped plate 2214 are rotatably connected to a connecting plate 2216 via bearings. A sliding post 2217 is fixedly connected to one end of the connecting plate 2216 away from the U-shaped plate 2214. The outer wall of the sliding post 2217 is connected to the sliding plate 228.

[0041] The working principle of this embodiment is as follows: When the equipment needs to be shut down urgently, the push rod 221 will be activated to move the connecting plate 222. Since the connecting post 214 in the rotating assembly 21 is embedded between the connecting plate 227 and the baffle plate 2212, the moving connecting plate 222 will drive the slider 229 to move along the track of the sliding plate 226 through the U-shaped plate 223. The moving slider 229 will drive the baffle plate 2212 to move towards the middle through the connecting rod 2210. At this time, the connecting plate 227 is no longer restricted by the selection component, so the movement of the U-shaped plate 223 will push the connecting plate 227 to move. At this time, the sliding post 2217 is no longer restricted by the pressing plate 208. The elastic component 2213 will allow the limiting post 2215 to be embedded in the slider 229, locking the position of the slider 229. With the movement of the connecting plate 227, space is provided for the extension of the rotating assembly 21 and the movement of the baffle plate 204, which facilitates the emergency shutdown of the equipment.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-durability gate valve made of ultra-high strength alloy material, comprising a shell (1), wherein a connecting ring (101) is fixedly connected to the outer wall of the shell (1), a motor (102) is fixedly connected to the outer wall of the shell (1), a rotating assembly (21) is fixedly connected to the output end of the motor (102), a pushing assembly (11) is fixedly connected to the inner wall of the shell (1), and a movable assembly (22) is also fixedly connected to the inner wall of the shell (1), characterized in that, Also includes: Valve body mechanism (2), the valve body mechanism (2) includes a connecting pipe (201), the outer wall of the connecting pipe (201) is fixedly connected to the connecting ring (101), a hollow column one (202) is fixedly connected to one end of the connecting pipe (201) away from the connecting ring (101), a hollow column two (203) is fixedly connected to both the upper and lower ends of the hollow column one (202), a baffle one (204) is movably connected to the inner wall of the hollow column one (202), a right angle plate (209) is provided at one end of the baffle one (204) away from the hollow column one (202), a slider two (2011) is fixedly connected to one end of the right angle plate (209) away from the baffle one (204), and the inner wall of the slider two (2011) is threadedly connected to the rotating assembly (21); The rotating assembly (21) includes a circular plate (211), the output end of the motor (102) is fixedly connected to the circular plate (211), a sliding column two (212) is fixedly connected to the side of the circular plate (211) away from the outer shell (1), an elastic component one (213) is fixedly connected to the inner wall of the sliding column two (212), a connecting column two (214) is fixedly connected to the end of the elastic component one (213) away from the sliding column two (212), a baffle two (215) is fixedly connected to the outer wall of the connecting column two (214), a threaded column (216) is fixedly connected to the side of the baffle two (215) away from the connecting column two (214), the inner wall of the threaded column (216) is movably connected to the sliding column two (212), a baffle three (217) is fixedly connected to the end of the threaded column (216) away from the baffle two (215), and the inner wall of the baffle three (217) is movably connected to the sliding column two (212). The movable component (22) includes a push rod two (221). The inner wall of the outer shell (1) is fixedly connected to the push rod two (221). A connecting plate one (222) is fixedly connected to the end of the push rod two (221) away from the outer shell (1). A U-shaped plate two (223) is fixedly connected to the outer wall of the connecting plate one (222). An elastic component two (224) is fixedly connected to the inner wall of the outer shell (1). A connecting plate two (225) is fixedly connected to the end of the elastic component two (224) away from the outer shell (1). A sliding groove plate one (226) is fixedly connected to the side of the connecting plate two (225) away from the elastic component two (224). A connecting plate three (227) is fixedly connected to the end of the sliding groove plate one (226) away from the connecting plate two (225). The outer wall of the connecting plate three (227) is fixedly connected to the connecting plate three (227). A sliding plate 2 (228) is fixedly connected. A slider 3 (229) is movably connected to the inner wall of the sliding plate 1 (226). The end of the U-shaped plate 2 (223) away from the connecting plate 1 (222) is fixedly connected to the slider 3 (229). The inner wall of the slider 3 (229) is rotatably connected to a connecting rod (2210) via a bearing. The end of the connecting rod (2210) away from the slider 3 (229) is rotatably connected to a blocking plate (2212) via a bearing. The side of the connecting plate 3 (227) away from the sliding plate 1 (226) is movably connected to the blocking plate (2212). The outer wall of the blocking plate (2212) is fixedly connected to an elastic component 3 (2211). The end of the elastic component 3 (2211) away from the blocking plate (2212) is fixedly connected to the connecting plate 3 (227). When the equipment needs to be shut down urgently, since the connecting post 2 (214) is embedded between the baffle plate (2212) and the connecting plate 3 (227), the push rod 2 (221) in the movable component (22) pushes the connecting plate 1 (222) and the U-shaped plate 2 (223) to move, which in turn drives the slider 3 (229) to slide along the inner wall of the slide plate 1 (226). The slider 3 (229) pulls the baffle plate (2212) to the middle through the connecting rod (2210), so that the rotating component (21) will not block the movement of the movable component (22), and the movable component (22) can be disengaged from the front of the rotating component (21), providing space for the extension of the rotating component (21) and the movement of the baffle plate 1 (204).

2. A high-durability gate valve using ultra-high strength alloy material according to claim 1, characterized in that: The end of the baffle (204) away from the hollow column (202) is fixedly connected to the slider (205). The outer wall of the slider (205) is movably connected to the hollow column (203). The end of the slider (205) away from the baffle (204) is fixedly connected to the connecting column (206). The end of the connecting column (206) away from the slider (205) is fixedly connected to the connector (207). The outer wall of the connector (207) is fixedly connected to the right angle plate (209). The outer wall of the right angle plate (209) is fixedly connected to the U-shaped plate (2010). The outer wall of the hollow column (203) is fixedly connected to the extrusion plate (208).

3. A high-durability gate valve using ultra-high strength alloy material according to claim 2, characterized in that: The pushing assembly (11) includes a sliding column (111), the inner wall of the outer shell (1) is fixedly connected to the sliding column (111), the outer wall of the sliding column (111) is movably connected to a right-angle ring (112), the end of the right-angle ring (112) away from the sliding column (111) is fixedly connected to a push rod (113), and the end of the push rod (113) away from the right-angle plate (209) is fixedly connected to the outer shell (1).

4. A high-durability gate valve using ultra-high strength alloy material according to claim 3, characterized in that: The outer wall of the second slide plate (228) is fixedly connected to an elastic component four (2213). The end of the elastic component four (2213) away from the second slide plate (228) is fixedly connected to a U-shaped plate three (2214). The end of the U-shaped plate three (2214) away from the elastic component four (2213) is fixedly connected to a limiting post (2215). The outer wall of the limiting post (2215) is movably connected to the first slide plate (226). Both ends of the U-shaped plate three (2214) are rotatably connected to a connecting plate four (2216) through bearings. The end of the connecting plate four (2216) away from the U-shaped plate three (2214) is fixedly connected to a sliding post three (2217). The outer wall of the sliding post three (2217) is movably connected to the second slide plate (228).

Images